[Taler] Nexus fails with transaction over 0.000001 units

[Florian Jung]

Hi,

when I create a transaction over 0.000001 units, the nexus fails to pick 
up the transaction via ebics. Instead, it throws EBICS_PROCESSING_ERROR. 
(Full stack trace below; my libeufin version is ~1-2 weeks old, you can 
find it at https://github.com/Windfisch/libeufin)

This locks the nexus up until I manually delete this transaction from 
the database.


This could actually be a very critical bug, since the exchange cannot do 
anything against someone wiring such an amount to the exchange's 
account, resulting in a Denial-of-Service.


Could you please provide me insight why this happens and how I can work 
around this for now?

Thanks/Cheers!

Florian



---snip---


libeufin_nexus_1    | 21:50:31.415 [DefaultDispatcher-worker-2] ERROR 
tech.libeufin.nexus - Exception during task TaskSchedule(taskId=2, 
name=fetch-reports-each-second, type=fetch, resourceType=bank-account, 
resourceId=nickname, params=
{
libeufin_nexus_1    |   "rangeType" : "latest",
libeufin_nexus_1    |   "level" : "report"
libeufin_nexus_1    | })
libeufin_nexus_1    | tech.libeufin.util.EbicsProtocolError: unexpected 
return code EBICS_PROCESSING_ERROR
libeufin_nexus_1    |   at 
tech.libeufin.nexus.ebics.EbicsClientKt.doEbicsDownloadTransaction(EbicsClient.kt:102) 

libeufin_nexus_1    |   at 
tech.libeufin.nexus.ebics.EbicsClientKt$doEbicsDownloadTransaction$1.invokeSuspend(EbicsClient.kt) 

libeufin_nexus_1    |   at 
kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33) 

libeufin_nexus_1    |   at 
io.ktor.util.pipeline.SuspendFunctionGun.resumeRootWith(SuspendFunctionGun.kt:191) 

libeufin_nexus_1    |   at 
io.ktor.util.pipeline.SuspendFunctionGun.loop(SuspendFunctionGun.kt:147)
libeufin_nexus_1    |   at 
io.ktor.util.pipeline.SuspendFunctionGun.access$loop(SuspendFunctionGun.kt:15) 

libeufin_nexus_1    |   at 
io.ktor.util.pipeline.SuspendFunctionGun$continuation$1.resumeWith(SuspendFunctionGun.kt:93) 

libeufin_nexus_1    |   at 
kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:46) 

libeufin_nexus_1    |   at 
io.ktor.util.pipeline.SuspendFunctionGun.resumeRootWith(SuspendFunctionGun.kt:191) 

libeufin_nexus_1    |   at 
io.ktor.util.pipeline.SuspendFunctionGun.loop(SuspendFunctionGun.kt:147)
libeufin_nexus_1    |   at 
io.ktor.util.pipeline.SuspendFunctionGun.access$loop(SuspendFunctionGun.kt:15) 

libeufin_nexus_1    |   at 
io.ktor.util.pipeline.SuspendFunctionGun$continuation$1.resumeWith(SuspendFunctionGun.kt:93) 

libeufin_nexus_1    |   at 
kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:46) 

libeufin_nexus_1    |   at 
io.ktor.util.pipeline.SuspendFunctionGun.resumeRootWith(SuspendFunctionGun.kt:191) 

libeufin_nexus_1    |   at 
io.ktor.util.pipeline.SuspendFunctionGun.loop(SuspendFunctionGun.kt:147)
libeufin_nexus_1    |   at 
io.ktor.util.pipeline.SuspendFunctionGun.access$loop(SuspendFunctionGun.kt:15) 

libeufin_nexus_1    |   at 
io.ktor.util.pipeline.SuspendFunctionGun$continuation$1.resumeWith(SuspendFunctionGun.kt:93) 

libeufin_nexus_1    |   at 
kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:46) 

libeufin_nexus_1    |   at 
io.ktor.util.pipeline.SuspendFunctionGun.resumeRootWith(SuspendFunctionGun.kt:191) 

libeufin_nexus_1    |   at 
io.ktor.util.pipeline.SuspendFunctionGun.loop(SuspendFunctionGun.kt:147)
libeufin_nexus_1    |   at 
io.ktor.util.pipeline.SuspendFunctionGun.access$loop(SuspendFunctionGun.kt:15) 

libeufin_nexus_1    |   at 
io.ktor.util.pipeline.SuspendFunctionGun$continuation$1.resumeWith(SuspendFunctionGun.kt:93) 

libeufin_nexus_1    |   at 
kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:46) 

libeufin_nexus_1    |   at 
io.ktor.util.pipeline.SuspendFunctionGun.resumeRootWith(SuspendFunctionGun.kt:191) 

libeufin_nexus_1    |   at 
io.ktor.util.pipeline.SuspendFunctionGun.loop(SuspendFunctionGun.kt:147)
libeufin_nexus_1    |   at 
io.ktor.util.pipeline.SuspendFunctionGun.access$loop(SuspendFunctionGun.kt:15)
libeufin_nexus_1    |   at 
io.ktor.util.pipeline.SuspendFunctionGun$continuation$1.resumeWith(SuspendFunctionGun.kt:93)
libeufin_nexus_1    |   at 
kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:46)
libeufin_nexus_1    |   at 
kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:106)
libeufin_nexus_1    |   at 
kotlinx.coroutines.scheduling.CoroutineScheduler.runSafely(CoroutineScheduler.kt:571)
libeufin_nexus_1    |   at 
kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.executeTask(CoroutineScheduler.kt:750)
libeufin_nexus_1    |   at 
kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.runWorker(CoroutineScheduler.kt:678)
libeufin_nexus_1    |   at 
kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run(CoroutineScheduler.kt:665)